Honeywell HON COCON 13, Operator'S Manual

Operators manual

© 2017 Honeywell International Inc. 

Operators manual underground gas pressure reducing station 

Type: HON COCON 13

Page 26

4.5

–

Trouble

shooting

The

cartridge

must

be

readjusted

if

it

is

not

operating

as

required.

The

cartridge's

operating

objectives

are

described

in

paragraph

2.4

on

page

13.

Adjustment

data

can

be

found

in

paragraph

4.4.

Failures

can

be

caused

by:

Problem

1

:

The

outlet

pressure

is

too

high.

Cause

1a

:

The

regulator

pilot

has

not

been

correctly

adjusted.

Solution

1a

:

Read

adjust

the

pilot.

See

paragraph

4.4.

Cause

1b

:

The

regulator

has

failed

open.

The

ssd

valve

is

closed

Solution

1b

:

Replace

the

cartridge

with

a

spare

cartridge.

Check

the

defective

cartridge

in

the

workshop.

Problem

2

:

The

outlet

pressure

is

too

low.

Cause

2a

:

The

regulator

pilot

has

not

been

correctly

adjusted.

Solution

2a

:

Readjust

the

pilot.

See

paragraph

4.7.

Cause

2b

:

The

differential

pressure

p

(p1

–

p2)

is

too

small.

Solution

2b

:

Increase

the

inlet

pressure.

Cause

2c

:

The

filter

is

severely

polluted.

Solution

2c

:

Replace

the

filter

with

a

new

one.

See

paragraph

4.10.3.

.

Problem

3

:

Gas

is

required,

but

is

not

passing

through.

Cause

3a

:

The

ball

valve

is

closed.

Solution

3a

:

Open

the

ball

valve.

Cause

3b

:

The

outlet

valve

is

closed.

Solution

3b

:

Open

the

outlet

valve.

Cause

3c

:

The

valve

in

the

supply

pipe,

located

within

a

distance

of

5

meters

from

the

station's

inlet

has

closed.

Solution

3c

:

Open

the

valve

in

the

supply

pipe.

Cause

3d

:

The

valve

in

the

discharge

pipe,

located

within

a

distance

of

5

meters

of

the

station's

outlet

has

closed.

Solution

3d

:

Open

the

valve

in

the

discharge

pipe.

Cause

3e

:

The

regulator

pilot

has

not

been

correctly

adjusted.

Solution

3e

:

Readjust

the

pilot.

See

paragraph

4.7.

Cause

3f

:

The

ssd

valve

has

closed.

Solution

3f

:

Replace

the

cartridge

with

a

spare

cartridge.

Check

the

defect

cartridge

in

the

workshop.

Problem

5

:

There

is

water

on

the

cartridge.

Cause

5

:

The

cartridge

and

the

pit

cover

seals

are

worn.

Solution

5

:

Replace

the

seal

rings.

Problem

6

:

There

is

dust

in

the

discharge

pipe.

Cause

6

:

The

filter

is

defect.

Solution

6

:

Replace

the

defect

filter

with

a

new

filter.

See

paragraph

4.8.3..